Finding the Fourth Proportional to 383,196.96, 528,828.06 and 213,431.10

Step by Step Solution

1. Step 1: Write the proportion equation
   383,196.96 : 528,828.06 = 213,431.10 : x
2. Step 2: Convert to fraction form
   383,196.96/528,828.06 = 213,431.10/x
3. Step 3: Cross multiply
   383,196.96x = 528,828.06 × 213,431.10
4. Step 4: Simplify right side
   383,196.96x = 112,868,354,556.67
5. Step 5: Solve for x
   x = 112,868,354,556.67/383,196.96
6. Step 6: Final answer
   x = 294,543.97